20854480

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:232

約数の個数: 80

約数和(自身を含む): 51224400

約数和(自身を除く): 30369920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 89, 101, 116, 145, 178, 202, 232, 290, 356, 404, 445, 464, 505, 580, 712, 808, 890, 1010, 1160, 1424, 1616, 1780, 2020, 2320, 2581, 2929, 3560, 4040, 5162, 5858, 7120, 8080, 8989, 10324, 11716, 12905, 14645, 17978, 20648, 23432, 25810, 29290, 35956, 41296, 44945, 46864, 51620, 58580, 71912, 89890, 103240, 117160, 143824, 179780, 206480, 234320, 260681, 359560, 521362, 719120, 1042724, 1303405, 2085448, 2606810, 4170896, 5213620, 10427240, 20854480]

約数ペア:

[(1, 20854480), (2, 10427240), (4, 5213620), (5, 4170896), (8, 2606810), (10, 2085448), (16, 1303405), (20, 1042724), (29, 719120), (40, 521362), (58, 359560), (80, 260681), (89, 234320), (101, 206480), (116, 179780), (145, 143824), (178, 117160), (202, 103240), (232, 89890), (290, 71912), (356, 58580), (404, 51620), (445, 46864), (464, 44945), (505, 41296), (580, 35956), (712, 29290), (808, 25810), (890, 23432), (1010, 20648), (1160, 17978), (1424, 14645), (1616, 12905), (1780, 11716), (2020, 10324), (2320, 8989), (2581, 8080), (2929, 7120), (3560, 5858), (4040, 5162)]